NYACOL® BurnEx™ 6220 has been developed as a flame retardant synergist for ABS, polyolefins and other materials employing halogens as the primary flame retardant. Color pigment loading can often be reduced by 50% when antimony trioxide is replaced by an equal weight of BurnEx™ 6220. The brilliance of fluorescent colors is easily maintained and translucency retained. In pastel shades the use of titanium dioxide as a white pigment together with BurnEx™ 6220 for flame retardancy is preferable for reproducible color matching.

BurnEx™ 6220 is manufactured by spray-drying colloidal antimony oxide from a water dispersion of 0.03 micron particles. The spray-dried powder is composed of agglomerated particles in the range of 0.5 to 2 microns. BurnEx™ 6220 is a free-flowing powder that does not require grinding to eliminate white specks.